# Garage door seals that stop mice, Calgary > Daylight under your Calgary garage door? Seal types, the daylight test, when DIY works and when to call. Seal repair by partner referral. Canonical: https://www.frameworkpest.ca/garage-door-seals-calgary/ Last updated: 2026-10-27 Garage Calgary and area · Fully licensed and insured If you can see daylight under your garage door, mice can get in. We find where mice get in around the garage, close the pest entry points that are ours to close, and refer garage door seal repair to a garage-door partner company we work with. Fully licensed and insured. Seal repair itself is done by a partner company. [Request a written quote](https://www.frameworkpest.ca/contact/) [Call 825 747 5787](tel:+18257475787) [Text a photo](sms:+18257475787) _Photo: Stilfehler, [CC BY-SA 4.0](https://commons.wikimedia.org/wiki/File:Garage_door_in_San_Luis_Obispo,_CA,_in_context.jpg), via Wikimedia Commons_ ## How it happens Garage door seals take a beating: the door lands on them every day, salt and gravel wear them, and cold makes rubber shrink and stiffen. Calgary’s Chinook swings can take a wall through several freeze-thaw cycles in one winter, and each cycle works sealant and trim joints loose. A joint that was tight in July can be open by February. ## Seal types - **Rubber or vinyl bottom seal** in a retainer: the standard fix for a worn door. - **Brush seal:** handles uneven floors and side gaps. - **Steel-mesh-backed seal:** resists chewing. - **Corner seals or blocks:** the corners are where most mice get in. _Photo: amslerPIX, [CC BY 2.0](https://commons.wikimedia.org/wiki/File:Garage_Door_-_House.jpg), via Wikimedia Commons_ ## What we do 1. Daylight test with the door closed, bottom edge and corners. 2. Check the retainer, floor and jambs. 3. Refer the bottom seal and corner seals to a garage-door partner company that repairs them. 4. Check the door from the garage into the house, the second line of defence. _Photo: Unknown, [Public domain](https://commons.wikimedia.org/wiki/File:Caulking,_USAF.jpg), via Wikimedia Commons_ ## DIY or call? DIY works for a standard retainer on a level floor. Call when the floor is uneven, the retainer is bent, the gaps are at the corners and jambs, or mice still get in after a new seal. ## What you can do today - ☐ Do the daylight test. - ☐ Move seed, pet food and cardboard off the garage floor. - ☐ Add a sweep to the door into the house. - ☐ Keep the door closed in the evenings in late summer and fall. Background reading: [exclusion vs bait stations](https://www.frameworkpest.ca/insights/exclusion-vs-bait-stations/). ## Related reading - [mouse-proofing service for Calgary homes](https://www.frameworkpest.ca/mouse-proofing/) - [pest exclusion engineering](https://www.frameworkpest.ca/services/exclusion-engineering/) - [Framework Pest home](https://www.frameworkpest.ca/) - [how to keep mice out of the house and garage](https://www.frameworkpest.ca/insights/keep-mice-out-of-house-garage/) - [mice in the attic](https://www.frameworkpest.ca/attic-mice-calgary/) - [garage mouse proofing: pest company vs garage door company](https://www.frameworkpest.ca/garage-mouse-proofing-pest-vs-garage-door-company/) - [local vs national pest control in Calgary](https://www.frameworkpest.ca/compare/local-vs-national-pest-control-calgary/) ## Questions ### Can mice get under a garage door? Yes. Worn bottom seals and the corners at each side are the most common gaps. A mouse fits through about 6 mm, so a seal that looks fine can still leak. ### How do I check my garage door seal? Close the door on a sunny day, turn off the lights and look along the bottom edge and both corners. Any daylight is a gap. Check again after a cold snap, because rubber shrinks and stiffens. ### Which seal type is best? It depends on the door and the floor. A new rubber or vinyl bottom seal fixes most worn doors; a brush or steel-mesh-backed seal resists chewing; corners usually need a separate seal or block. We look at the door before recommending one. ### Can I replace the seal myself? Often, yes, if the door has a standard retainer and the floor is level. Call someone when the floor is uneven, the retainer is damaged, the gap is at the corners or jambs, or mice keep coming back after a new seal. ### Do you fix springs or openers? No. Springs, openers and panels are a garage door company's job, and we will tell you if that is what the door needs. ## Show us the gap. Text a photo, call, or request a written quote. [Request a written quote](https://www.frameworkpest.ca/contact/) [Call 825 747 5787](tel:+18257475787) [Text a photo](sms:+18257475787)